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Prior to placement of a subsequent lift, the previous lift shall be thoroughly <br />scarified to a nominal depth of 2-inches to provide good bonding between <br />lifts. Scarification shall be accomplished by discing, raking with a grader, <br />or an alternative method approved by CERTIFYING ENGINEER. <br />10. The CQA Monitor wilt measure the ambient air temperature on an hourly <br />basis. If the ambient air temperature is less than thirty-two degrees <br />Fahrenheit for more than one hour (1) over the preceding twenty-four 124) <br />hours, the CQA Monitor will measure the temperature of the fill to <br />determine if the fill is frozen. 'Frozen' is defined as a mean temperature <br />of thirty-two degrees Fahrenheit 132°F) or less. The CQA Monitor will <br />measure the temperature at a depth of three 13) inches and six I6) inches, <br />recording the lowest of the two. Six I61 measurements will be taken per <br />acre, and if the average is below thirty-two degrees Fahrenheit (32°F), the <br />fill will be considered frozen. If the fill is determined to be frozen the <br />CONTRACTOR may either remove and replace the frozen fill or wait until <br />subsequent temperature monitoring indicates the fill is unfrozen, at no cost <br />to CC&V. <br />B. Structural Fill <br />Areas to receive Structural Fill will include, but are not limited to, slope <br />reductions, and miscellaneous site grading. <br />2. CONTRACTOR shall condition Structural Fill to a moisture content that <br />allows compaction to the required density and that results in a firm, <br />unyielding surface capable of allowing the movement of vehicles and <br />equipment over the surface without causing rutting or other deleterious <br />effects. <br />3. CONTRACTOR shall place Structure( Fill materials with less than 30 <br />percent rock materials above 3/4-inch size in maximum 12-inch loose lihs, <br />and compact to 95 percent of maximum dry density (ASTM D698). <br />4. CONTRACTOR shaft Condition, place and compact Structural Fill containing <br />more than 30 percent rock materials above 3/4-inch size frock filq by a <br />method compaction technique. The compaction equipment shall consist <br />of a minimum 10-ton (static drum weight) vibratory smooth-0rum <br />compactor. The number of passes and taose lift thickness shall be subject <br />to CERTIFYING ENGINEEA'a approval, at no additional cost to CC&V. The <br />method SPECIFICATIONS may be changed at any time, at the discretion of <br />CERTIFYING ENGINEER, based upon changes in material characterisrics, <br />field conditions, and/or compaction equipment. <br />Maximum rock size for rock fill shalt be two-thirds of the compacted lift <br />thickness, unless otherwise approved by MANAGER, DESIGN ENGINEFA <br />and CERTIFYING ENGINEER. CONTRACTOR shall remove oversize <br />materials from fills at no additional cost to CC&V. <br />Section 02200 Page 9 of 15 March 2, 1999 <br />Earthworks GolderAssodafes Revision 6 <br />,....+..wsrc~sass:nzxm~acac <br />